Provide the win-x64 runtime nuget for TensorFlow Gpu

The library necessary to pack the nuget can be downloaded with the
Copy-NativeTensorFlowLibs.ps1 powershell script.

TensorFlow.NET.sln

@@ -22,6 +22,12 @@ EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TensorFlowDatasets", "src\TensorFlowDatasets\TensorFlowDatasets.csproj", "{DF151A51-E9FD-41BD-B0F4-08A743755D44}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TensorFlowNET.Examples.GPU", "test\TensorFlowNET.Examples\TensorFlowNET.Examples.GPU.csproj", "{6F6B3382-8F87-4CD9-BF87-C81D5405685A}"
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "scripts", "scripts", "{EA9A238E-B93F-4809-AB3D-339B2990FBFF}"
+	ProjectSection(SolutionItems) = preProject
+		scripts\Copy-NativeTensorFlowLibs.ps1 = scripts\Copy-NativeTensorFlowLibs.ps1
+	EndProjectSection
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "runtime.win-x64.SciSharp.TensorFlow-Gpu.Redist", "src\runtime.win-x64.SciSharp.TensorFlow-Gpu.Redist\runtime.win-x64.SciSharp.TensorFlow-Gpu.Redist.csproj", "{BEC7FC31-58BD-48C1-96CE-6B68570A5431}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -61,6 +67,7 @@ Global
 		{B598E5D5-BD2D-4191-8532-F2FBAC31AB81}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{B598E5D5-BD2D-4191-8532-F2FBAC31AB81}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{B598E5D5-BD2D-4191-8532-F2FBAC31AB81}.Release|Any CPU.Build.0 = Release|Any CPU
+<<<<<<< HEAD
 		{DF151A51-E9FD-41BD-B0F4-08A743755D44}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{DF151A51-E9FD-41BD-B0F4-08A743755D44}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{DF151A51-E9FD-41BD-B0F4-08A743755D44}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -69,6 +76,12 @@ Global
 		{6F6B3382-8F87-4CD9-BF87-C81D5405685A}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{6F6B3382-8F87-4CD9-BF87-C81D5405685A}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{6F6B3382-8F87-4CD9-BF87-C81D5405685A}.Release|Any CPU.Build.0 = Release|Any CPU
+=======
+		{BEC7FC31-58BD-48C1-96CE-6B68570A5431}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{BEC7FC31-58BD-48C1-96CE-6B68570A5431}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{BEC7FC31-58BD-48C1-96CE-6B68570A5431}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{BEC7FC31-58BD-48C1-96CE-6B68570A5431}.Release|Any CPU.Build.0 = Release|Any CPU
+>>>>>>> Provide the win-x64 runtime nuget for TensorFlow Gpu
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

scripts/Copy-NativeTensorFlowLibs.ps1

@@ -0,0 +1,21 @@
+$targetDirectory = [IO.Path]::Combine($PSScriptRoot, "..", "src", "runtime.win-x64.SciSharp.TensorFlow-Gpu.Redist")
+
+$fileName = "libtensorflow-gpu-windows-x86_64-1.14.0.zip"
+$zipfile = [IO.Path]::Combine($PSScriptRoot, "..", "packages", $fileName)
+if (-not (Test-Path $zipfile -PathType Leaf)) {
+    # Create the directory just in case it's actually needed...
+    $path = [IO.Path]::Combine($PSScriptRoot, "..", "packages")
+    New-Item -Path $path -Force -ItemType Directory
+    Write-Host "Downloading libtensorflow gpu for Windows..."
+    $wc = New-Object System.Net.WebClient
+    $wc.DownloadFile("https://storage.googleapis.com/tensorflow/libtensorflow/libtensorflow-gpu-windows-x86_64-1.14.0.zip", $zipfile)
+}
+
+$libraryName = "tensoflow.dll"
+$libraryLocation = "lib\tensorflow.dll"
+$windowsTensorFlow = Join-Path $targetDirectory $libraryName
+
+if (-not (Test-Path $windowsTensorFlow))
+{
+    & 7z e $zipfile $libraryLocation -o"$targetDirectory"
+}

src/runtime.win-x64.SciSharp.TensorFlow-Gpu.Redist/.gitignore

@@ -0,0 +1 @@
+tensorflow.dll

src/runtime.win-x64.SciSharp.TensorFlow-Gpu.Redist/runtime.win-x64.SciSharp.TensorFlow-Gpu.Redist.csproj

@@ -0,0 +1,40 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Library</OutputType>
+    <TargetFramework>netstandard2.0</TargetFramework>
+    <RuntimeIdentifier>win-x64</RuntimeIdentifier>
+    <AssemblyName>SciSharp.Tensorflow-Gpu.Redist</AssemblyName>
+
+    <PackageId>runtime.win-x64.SciSharp.Tensorflow-Gpu.Redist</PackageId>
+    <Version>1.0.0</Version>
+    <Authors>SciSharp team</Authors>
+    <Company>SciSharp STACK</Company>
+    <RepositoryUrl>https://github.com/SciSharp/TensorFlow.NET</RepositoryUrl>
+    <RepositoryType>git</RepositoryType>
+    <Description>
+      Distribution of the windows GPU Tensoflow library.
+      Dll can be directly downloaded from https://storage.googleapis.com/tensorflow/libtensorflow/
+    </Description>
+    <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
+
+    <PackageProjectUrl>https://github.com/SciSharp/TensorFlow.NET</PackageProjectUrl>
+    <PackageTags>native;tensorflow;machine-learning;ML</PackageTags>
+    <PackageOutputPath>../../packages</PackageOutputPath>
+    <GeneratePackageOnBuild>false</GeneratePackageOnBuild>
+
+    <EnableDefaultCompileItems>false</EnableDefaultCompileItems>
+    <ProduceReferenceAssembly>false</ProduceReferenceAssembly>
+    <IncludeBuildOutput>false</IncludeBuildOutput>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <!-- All dlls will be dropped in a folder available through DllImport.-->
+    <Content Include="*.dll">
+      <PackagePath>runtimes/$(RuntimeIdentifier)/native/%(Filename)%(Extension)</PackagePath>
+      <Pack>true</Pack>
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
+
+</Project>